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computer vulnerability note CVE-2016-0763

Apache Tomcat: read-write access via setGlobalContext

Synthesis of the vulnerability

An attacker, who is allowed to upload a malicious web application on the service, can bypass access restrictions via setGlobalContext of Apache Tomcat, in order to read or alter data.
Impacted products: Tomcat, Debian, Fedora, SiteScope, HP-UX, Snap Creator Framework, openSUSE Leap, Oracle Directory Server, Oracle Directory Services Plus, Oracle Fusion Middleware, Oracle GlassFish Server, Oracle Identity Management, Oracle iPlanet Web Server, Oracle OIT, Oracle Virtual Directory, WebLogic, Oracle Web Tier, RHEL, SUSE Linux Enterprise Desktop, SLES, Ubuntu.
Severity of this bulletin: 2/4.
Consequences of an intrusion: data reading, data creation/edition, data deletion.
Hacker's origin: document.
Creation date: 22/02/2016.
Références of this threat: 1980693, c05150442, c05324755, cpuapr2017, cpuoct2017, CVE-2016-0763, DSA-3530-1, DSA-3552-1, DSA-3609-1, FEDORA-2016-e6651efbaf, HPSBGN03669, HPSBUX03606, NTAP-20180531-0001, openSUSE-SU-2016:0865-1, RHSA-2016:1087-01, RHSA-2016:1088-01, RHSA-2016:1089-01, RHSA-2016:2599-02, RHSA-2016:2807-01, RHSA-2016:2808-01, SUSE-SU-2016:0769-1, SUSE-SU-2016:0822-1, USN-3024-1, VIGILANCE-VUL-18999.

Description of the vulnerability

The Apache Tomcat product can execute a web application from an untrusted source with a Security Manager.

However, a malicious application can use ResourceLinkFactory.setGlobalContext() to inject a context in another application, and access to its data.

An attacker, who is allowed to upload a malicious web application on the service, can therefore bypass access restrictions via setGlobalContext of Apache Tomcat, in order to read or alter data.
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